TEM air analysis results, Oct 10 2001

NYC 9/11 Public Portal Document

ATC ASSOCIATES INC. TEM ANALYSIS LAB GROUP #: 5662 - 10/10/01

Lab Sample No-. 60802 Filter Type MCE 25 mm Operacor /id Client Spl. No. NSH5-EIR-1Q/I0-03 Filter Arsa 385 mm^2 Instrument I.D. EM 10 CRX Grid I.D. Disk No. Screen Magnification 16,4O0X (GO) Area 0.01124 mn~2 Coninencs

Acc. Voltage 80 kV No. GO to be Analyzed 4 ( 3.147 Struct. Corspd. to 70 s/mm^Z.)

GO. structure structure Type Length I.D. of Structure EDS >0.5 um (Nonasb. No Coord. No. F B C M Sum Chrys. Amphibole Nonasb. Ambig./ND Elements) < 5 um

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E Photo No. (from 1 In 5 a«tie»lo«- IdenUfy all etructurea uelnn ESS Chee I dlftrection for aibesloe Store all unrepealed spectra containing cnmplca) Grid acceptance:! Btructures up to 70a (nt 4) <S0X undiaaolved filteroverlapped or folded Struct. = > O.Sum & > 9:1 Aspect Ratio <10X particulate coverage >50X coverage Totals Ns Not Observed (CDS spectrum or diffraction pattern) at least 20 unfolded or overlapped grid aquaree /= Positive diffraction pattern preperUea ennforminf <9X holes or opaque areas F B C M Sum tn laboratory identification criteria obaerved. •UnuMd portion Per chryaoUle: 0.73nm apacina for (020) reflacUona, or niter Chrysotile O.&Onm apeeinf for the layer line repeat, etreakinc -Avoided portion of (110) and (130) reflecUona. of niur For amphlbolea: OJSaum layer Une repeat, and approx. PorUon of niter tSmm wide) 3.0 ratio of non-twlnned layer Une apot apacing to subject to Amphibole layer line repeat dletance (Q.&3nm). examlnaUon

EDS apeetrum conforming to laboratory Ambiguous identification criteria observed. amphiboles P= Single Fiber (1-3 intemeUona s 1-3 fiben) Amosite Bs Bundle (>3 flhen <1 fiber diameter apart) ZSinin niter Crocidolite Non—asbestos Cs Clueter {>3 InteroecUona) J stopping Huie.; I------- Ms Matrix Anthophyllite NSOs No Structures Detected [ >M i/C.O. or In lol 4 C.O. Tremolite Actinolite Non-Identified U\DATA\PR[VATE\MIKKC\CADDVEUa 0/22/08

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